4 files changed, 41 insertions, 2 deletions

diff --git a/.gitignore b/.gitignore
index 6020bc1..bfa871f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,11 @@
 *.o

 *.a

 .*.swp

+.*.un~

+/c++-libbu++/.build_cache

 /c++-libbu++/gats

+/c++-libbu++/gatsc

+/c++-libbu++/src/version.h

 /c++-qt/Makefile*

 *.dll

 /c++-qt/object_script.*

diff --git a/c++-libbu++/src/dictionary.cpp b/c++-libbu++/src/dictionary.cpp
index 5ed3834..00d06f7 100644
--- a/c++-libbu++/src/dictionary.cpp
+++ b/c++-libbu++/src/dictionary.cpp
@@ -12,6 +12,7 @@
 #include "gats/float.h"
 #include "gats/string.h"
 #include "gats/list.h"
+#include "gats/null.h"
 
 #include <bu/formatter.h>
 
@@ -249,6 +250,22 @@ Gats::Dictionary *Gats::Dictionary::insertDict( const Bu::String &sKey )
     return pDict;
 }
 
+void Gats::Dictionary::insertNull( const Bu::String &sKey )
+{
+    Bu::Hash<Gats::String, Gats::Object *>::insert(
+        sKey,
+        new Gats::Null()
+        );
+}
+
+bool Gats::Dictionary::isNull( const Bu::String &sKey )
+{
+    Gats::Object *pObj = get( sKey );
+    if( pObj->getType() == Gats::typeNull )
+        return true;
+    return false;
+}
+
 bool Gats::Dictionary::getBool( const Bu::String &sKey )
 {
     Gats::Boolean *pOb = dynamic_cast<Gats::Boolean *>( get( sKey ) );
@@ -309,6 +326,14 @@ Gats::Dictionary *Gats::Dictionary::getDict( const Bu::String &sKey )
     return pOb;
 }
 
+bool Gats::Dictionary::isNull( const Bu::String &sKey ) const
+{
+    Gats::Object *pObj = get( sKey );
+    if( pObj->getType() == Gats::typeNull )
+        return true;
+    return false;
+}
+
 bool Gats::Dictionary::getBool( const Bu::String &sKey ) const
 {
     Gats::Boolean *pOb = dynamic_cast<Gats::Boolean *>( get( sKey ) );
diff --git a/c++-libbu++/src/dictionary.h b/c++-libbu++/src/dictionary.h
index d2cdec0..84cf69f 100644
--- a/c++-libbu++/src/dictionary.h
+++ b/c++-libbu++/src/dictionary.h
@@ -54,7 +54,9 @@ namespace Gats
         void insertDict( const Bu::String &sKey, Gats::Dictionary *pD );
         Gats::List *insertList( const Bu::String &sKey );
         Gats::Dictionary *insertDict( const Bu::String &sKey );
+        void insertNull( const Bu::String &sKey );
 
+        bool isNull( const Bu::String &sKey );
         bool getBool( const Bu::String &sKey );
         int64_t getInt( const Bu::String &sKey );
         double getFloat( const Bu::String &sKey );
@@ -62,6 +64,7 @@ namespace Gats
         Gats::List *getList( const Bu::String &sKey );
         Gats::Dictionary *getDict( const Bu::String &sKey );
         
+        bool isNull( const Bu::String &sKey ) const;
         bool getBool( const Bu::String &sKey ) const;
         int64_t getInt( const Bu::String &sKey ) const;
         double getFloat( const Bu::String &sKey ) const;
diff --git a/php/phpgats2.php b/php/phpgats2.php
index effaa78..f97bd89 100644
--- a/php/phpgats2.php
+++ b/php/phpgats2.php
@@ -237,7 +237,11 @@ function _phpgats2_writeDictionary( $d )
 
 function _phpgats2__write( $unknown )
 {
-        if( is_bool( $unknown ) )
+    if( is_null( $unknown ) )
+    {
+        return 'n';
+    }
+    else if( is_bool( $unknown ) )
         {
                 return _phpgats2_writeBoolean( $unknown );
         }
@@ -462,7 +466,10 @@ function _phpgats2_parseMaster( $str_data, &$offset, $dbg=0 )
                 case '0':
                         //echo "false\n";
                         return false;
-                        break;
+            break;
+        case 'n':
+            return null;
+            break;
                 default:
                         //echo "str:";
                         $obj = _phpgats2_parseString( $str_data, $offset, $dbg );